hi i have a d16z6 swapped into a 90 civic. i have a problem starting when cold. this problem just started recently. i will try to turn over for about 10 seconds and it kinda starts but idle is at 100ish. i have to go through this 5-6 times before it actully starts. on a warm day or when car is warm no problems. i have changed spark plus and distributor cap and rotor.

also when the car actully starts when its cold, the vtec doesn't work unless i let the car warm up and turn off ignition and start the car again.

help, thanks in advance

 

one thing vtec don't work untell you motor is warm, thats part of what the vtec pressure sensor is for. and another thing you mite want to check your fuel sym.( fuel filter, fuel pump, fuel pressure reg. etc...) it could be one of many things, good luck

 

IDK

let's guess here.

Have you sprayed carb cleaner in the TB, or taken the IACV off and cleaned it with carb cleaner?

Check the FICV under the TB, make sure the plunger towards the front of the car.

 

thanks